CAREFUL WITH THE SIGNS!What is the approximate value of ΔS° for binding of NAG3 to HEW at 27°C?ΔH° = -50 kJ/mol, ΔG° = -30 kJ/mol.-200 J/K-67 J/K67 J/K200 J/K

The final velocity of the boy/boat system is 1.43 m/s forward. The correct answer is 1.43 m/s forward.

The final velocity of the boy/boat system can be determined using the principle of conservation of momentum. Momentum is defined as the product of an object's mass and velocity. According to the conservation of momentum, the total momentum before the jump is equal to the total momentum after the jump.

Given:
Mass of the boy (m1) = 50 kg
Initial velocity of the boy (v1) = 5 m/s
Mass of the boat (m2) = 125 kg
Initial velocity of the boat (v2) = 0 m/s

Step 1: Calculate the initial momentum of the boy and the boat separately.
Initial momentum of the boy (p1) = m1 * v1
Initial momentum of the boat (p2) = m2 * v2
Since the boat is stationary, its initial momentum is zero.

Step 2: Calculate the total initial momentum of the system.
Total initial momentum (p_initial) = p1 + p2

Step 3: Calculate the final momentum of the system.
Final momentum of the system (p_final) = total initial momentum (p_initial)

Step 4: Use the final momentum to calculate the final velocity of the system.
Final velocity of the system (v_final) = p_final / (m1 + m2)

Substitute the given values into the equation:
v_final = p_final / (m1 + m2)

v_final = (p1 + p2) / (m1 + m2)

v_final = (m1 * v1 + m2 * v2) / (m1 + m2)

Substitute the values:
v_final = (50 kg * 5 m/s + 125 kg * 0 m/s) / (50 kg + 125 kg)

v_final = (250 kg·m/s + 0 kg·m/s) / (175 kg)

v_final = 250 kg·m/s / 175 kg

v_final = 1.43 m/s

So, the final velocity of the boy/boat system is 1.43 m/s forward.

Therefore, the correct answer is "1.43 m/s, forward."

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The curve rises steeply and then levels off or rises gradually until well beyond the edge of the visible galaxy. This is known as the rotation curve of a galaxy.

It describes the distribution of mass within the galaxy and helps astronomers understand the dynamics of galactic rotation. The steep rise in the curve indicates a concentration of mass towards the center of the galaxy, while the leveling off or gradual rise suggests the presence of dark matter, which extends beyond the visible galaxy.

In a typical galaxy, such as the Milky Way, the rotation curve initially rises steeply as we move away from the galactic center. This steep rise is expected due to the influence of the visible mass (stars and interstellar gas) concentrated near the center of the galaxy.

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Answer: is B



Explanation: when reduce, like uranium, we gain potential energy as molecules

are donated transfered to other compound or molecular

Answer:

1.1 m/s²

Explanation:

From the question,

F -mgμ = ma.................... Equation 1

Where F = applied force, m = mass of the apple cart, g = acceleration due to gravity, μ =  coefficient of friction., a = acceleration of the apple cart.

Given: F = 115 N, m = 25 kg,  μ  = 0.35

Constant: g = 10 m/s²

Substitute these values into equation 2

115-(25×10×0.35) = 25×a

115-87.5 = 25a

25a = 27.5

a = 27.5/25

a = 1.1 m/s²

Answer:

I DONT KNOW WHAT TO DO SORRY

Explanation:

EVEN ME IM NOT SURW

Answer:

a. normal

Explanation:

In the field of physics the normal is a line drawn at a right angle to a barrier. In other words the normal line is the line that is drawn perpendicular (right angle, 90 degrees) to the reflective surface of a mirror, or the particular boundary in which refraction occurs at the point of incidence of a light ray. This can be seen in the picture attached below.

Answer:

The portion of the presentation that summarizes all of the points is conclusion.

Explanation:

In a presentation, the portion that summarizes all of the main points is the conclusion. The conclusion is the final section of a presentation that brings together all of the main ideas and arguments that have been discussed throughout the presentation. It provides a summary of the main points and highlights the key takeaways that the audience should remember.

The conclusion should be concise and clear, and it should leave a lasting impression on the audience. It is often helpful to restate the thesis or main idea of the presentation in the conclusion and to provide some final thoughts or recommendations that relate to the topic. The conclusion should also be memorable and leave the audience with a sense of closure and satisfaction that they have learned something new and valuable.

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The receiver of a signal must understand the code or language being used to avoid confusion and losses.

This is usually in the form of a sound or body movement and is involved in conveying messages to people.

The receiver must understand the code or language in order to prevent confusion or loss of lives and properties.

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Answer: Animals are used in many different kinds of experiments. These are just a few examples and alternatives to using animals in experiments.

Explanation:

Other than gravity, inertia is the force that governs a planet's or moon's orbit.

The values of an object's inertial weight and gravitational mass are the same, but their methods of measurement are different. While gravitational mass quantifies the force acting on an item in a gravitational field, inertial mass is determined by measuring an organism's resistance to change in velocity.

Inertia was ranked as the second-most potent force inside the universe by Kristofferson (behind gravity). Although other forces that are stronger than both have since been discovered, it is still one of most significant and powerful forces in the cosmos.

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The perpendicular component of a displacement factor with a magnitude of 20 m is 20 m as well. When an object moves from its initial position to a final position, the displacement is the straight-line distance between the two positions and the direction of the displacement is from the initial position to the final position.

A perpendicular component is created when the displacement vector is resolved into two components. When a displacement vector is divided into two perpendicular components, the magnitude of each component is found using the Pythagorean theorem. The Pythagorean theorem states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

This theorem is represented mathematically as: a² + b² = c².Where c is the length of the hypotenuse, and a and b are the lengths of the other two sides of the triangle. In this case, the hypotenuse represents the displacement vector, and the two other sides represent the components of the displacement vector that are perpendicular to each other. Therefore, the perpendicular component of a displacement factor with a magnitude of 20 m is 20 m as well.

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Answer:

Gamma rays occupy the short-wavelength end of the spectrum; they can have wavelengths smaller than the nucleus of an atom. Visible light wavesare one-thousandths the width of human hair--about a million times longer than gamma rays. Radio waves, at the long-wavelength end of the spectrum, can be many meters long.

Answer:D "the frequency of gamma rays is greater."

Explanation:Trust

Spraying an asphalt road with water will make it easier to walk across and bare feet on a hot sunny day because it has a high specific heat capacity.

This is referred to as the amount of heat which is required to raise the temperature of the unit mass of a given substance by a given amount.

Water as a compound has a very high specific heat capacity which means that it needs a high amount of heat for the temperature to change. This therefore means that when the water is sprayed on the surface, the road doesn't become too hot and can be walked on with the barefoot which makes it the correct reason.

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LED produces incoherent light, whereas LASER produces coherent light. Bandgap of the semiconductor to produce a green light of 550 nm is around 2.25 eV. White light is obtained from semiconductor LED by using phosphor

An LED works by spontaneous emission of light in the forward-biased p-n junction, whereas the Laser produces light through stimulated emission, which takes place in an optical cavity.

White light is obtained from a semiconductor LED by using a phosphor that emits light when it is excited by the blue light generated by the LED.

The blue light from the LED is absorbed by the phosphor and re-emitted as yellow light, which combines with the remaining blue light to produce white light.

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Complete Question

Consider the heaviest box of 68 kg that you can push at constant speed across a level floor, where the coefficient of kinetic friction is 0.50, and estimate the maximum horizontal force that you can apply to the box. A box sits on a ramp that is inclined at an angle of 50.0 ∘ above the horizontal. The coefficient of kinetic friction between the box and the ramp is 0.50.If you apply the same magnitude force, now parallel to the ramp, that you applied to the box on the floor, what is the heaviest box (in pounds) that you can push up the ramp at constant speed? (In both cases assume you can give enough extra push to get the

Answer:

The force on the heaviest mass  is   \(F = 333.2 \ N\)

The mass on the inclined ramp is  \(M = 76.47 \ kg\)  

Explanation:

From the question we are told that

   The mass of the heaviest box is  \(m = 68 \ kg\)

   The coefficient of kinetic friction is  \(\mu_k = 0.50\)

     The angle at which the ramp is inclined is  \(\theta = 50^o\)

Generally at constant speed the acceleration is zero , which implies that

           \(F - F_f = 0\)

  Here  F is the horizontal  force applied to the heaviest box   and  \(F_f\) is the kinetic frictional  force which is mathematically represented as

        \(F_f = \mu_k * m * g\)

=>     \(F_f = 0.50 * 68 * 9.8\)

=>     \(F_f = 333.2 \ N\)

So

               \(F - 333.2 = 0\)

=>             \(F = 333.2 \ N\)

Considering the ramp inclined at an angle above the horizontal

         Generally apart from the force F  acting on the box in a direction parallel to the ramp the other force acting on the box parallel to the ramp is the net force due to frictional force on the object which is mathematically represented as

         \(F_f_h = \mu Mg cos (\theta )\)

and the weight of the object which is mathematically represented as

            \(F_w = Mg sin (\theta )\)

So the net force is  mathematically evaluated as

       \(F_n = F_w - F_{fh}\)

=>     \(F_n =Mg sin (\theta ) - \mu Mg cos (\theta )\)

=>     \(F_n =M [ 9.8 sin ( 50 )-0.50 * 9.8 cos (50 ) ]\)

=>     \(F_n = 4.3576M \ N\)

So the net force acting on the box parallel to the ramp is  mathematically represented as

      \(F_{net} = F - F_n\)  

=>    \(F_{net} = 333.2- 4.3575M\)  

=>    \(ma = 333.2- 4.3575M\)  

From the question we are told the velocity is  constant so the acceleration is zero  

   =>    \(333.2- 4.3575M = 0\)  

     =>    \(M = 76.47 \ kg\)  

Answer:  

C. Software Engineer

Explanation:

a ray of light pass through raindrops which acts like prism and split the light into its 7 constituent...which when seen by our eyes , we presume it to be a rainbow

The first step(s) to diffuse a disturbance should be to identify the nature and cause of the disturbance and then proceed by appropriately managing the issue.

A disturbance is usually an interruption of the peaceful and smooth course of events or activities, which is caused by various factors, including misunderstanding, disagreement, conflicting ideas, opposing views, among others. Such disturbances require prompt management to minimize the harm that may come as a result and help return to a more peaceful state. The first step in managing the disturbance is usually to assess the nature and cause of the disturbance. This is to help in identifying the core issue and decide the most appropriate way to address it.

After understanding the nature and cause of the disturbance, appropriate management techniques can be used, depending on the severity of the issue and the preferred outcome. For instance, if the disturbance is due to miscommunication, it may require a clarification of the misunderstood message, while if it is due to disagreements, it may require mediation or negotiation to find a common ground.

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Work done in lifting a bucket of water 10 kg to a platform 45 meters above the ground by exerting force is calculated to be 4,406 J.

Given:

mass of bucket of water, m = 10 kgholes in the bucket is such that 4 kg of water drips out while being lifted

height of the platform, h = 45 mg = 9.8 m/s² time taken, t = 14 minutes = 840 s

Let us first calculate the force required to lift the bucket initially.

Force required to lift the bucket initially,F = mgwhere, m = 10 kgand g = 9.8 m/s²∴ F = 10 x 9.8= 98 NNow, to find the work done to lift the bucket, we use the formula,

Work = Force x Distance moved in the direction of the force

∴ Work done = F x h

But, 4 kg of water drips out while being lifted So, mass of water in the bucket after 14 minutes = 10 – 4= 6 kg

Now, force required to lift the bucket and water (6 kg) after 14 minutes,

F’ = m’g

where, m’ = 6 kg and g = 9.8 m/s²∴ F’ = 6 x 9.8= 58.8 NNow,

Work done = F’ x h∴ Work done = 58.8 x 45= 2646 J

Therefore, the total work done to lift the bucket = Work initially + Work done after 14 minutes= 98 x 45 + 2646= 4406 J

Work done in lifting a bucket of water 10 kg to a platform 45 meters above the ground by exerting force is calculated to be 4,406 J.

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Answer:

B. and D.

Explanation:

phases of matter are solid liquid and gas

Answer:

b and d

Explanation:

phases are solid liquid and gas

Acceleration is a derived unit because it is derived from two quantities : Velocity and time.

We know, acceleration = Change in velocity/Time

International space station is the mission of NASA. It has launched 134 successful space missions.

International space station is a huge place in the space but in the close orbit with all possible facilities for astronauts , scientists and others

The National Aeronautics and Space Administration (NASA) is an acronym for the National Aeronautics as well as Space Administration. NASA was established as a division of the United States government on October 1, 1958. NASA is just in charge of all research and technology related to aviation and space in the United States.

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To determine the number of half-lives that have elapsed, we need to compare the ratio of 14C to 14N atoms found in the hip bone fragment.

The ratio of 1 14C atom for every 31 14N atoms suggests that the hip bone fragment contains a smaller amount of 14C compared to the expected ratio found in a living organism. Since 14C undergoes radioactive decay with a half-life of approximately 5730 years, we can calculate the number of half-lives that have elapsed by observing how many times the ratio needs to double to reach the expected ratio.

In this case, if the expected ratio is 1:1, then the observed ratio of 1:31 would require five doublings to reach 1:1. Therefore, approximately five half-lives have elapsed since the death of the organism from which the hip bone fragment originated.

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Answer:

B

Explanation:

A P E X

The possible valid accesses for an array a and vector v, each with 10 elements is given below:Array: a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], a[9]Vector: v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7], v[8], v[9]

The term array is used to define a set of similar data types that are stored in contiguous memory blocks. The index of an array starts at 0, which means the first element of the array is stored at index 0. In the case of arrays, the elements must be of the same data type.The term vector is defined as a dynamic array, which means that the size of the vector can be changed during runtime. Vectors are defined in the same way as arrays, except that they have a dynamic size limit and can be easily resized.

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In an inductor connected to an AC voltage source, the current lags behind the voltage. This is due to the nature of inductors, which resist changes in current flow and generate a magnetic field when a current is passed through them.

When an AC voltage is applied to an inductor, the current begins to flow through it. However, because the inductor opposes changes in current flow, the current takes time to build up. As the current increases, the inductor generates a magnetic field around it.

This magnetic field opposes the changes in current flow and generates a back EMF (electromotive force) in the opposite direction of the current. This back EMF limits the amount of current that can flow through the inductor.

The amount of lag between the voltage and current in an inductor is dependent on the frequency of the AC voltage and the value of the inductance. The higher the frequency or inductance, the greater the lag between the voltage and current.

This lag is often expressed as the phase angle between the voltage and current and is measured in degrees. In an inductor, the phase angle between the voltage and current is always lagging behind the voltage by 90 degrees. This is why inductors are said to have a reactive power that is not dissipated but stored in the magnetic field.

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